GB1499985A - Control of chokes - Google Patents

Control of chokes

Info

Publication number
GB1499985A
GB1499985A GB18663/74A GB1866374A GB1499985A GB 1499985 A GB1499985 A GB 1499985A GB 18663/74 A GB18663/74 A GB 18663/74A GB 1866374 A GB1866374 A GB 1866374A GB 1499985 A GB1499985 A GB 1499985A
Authority
GB
United Kingdom
Prior art keywords
choke
circuit
primes
amplifier
voltage output
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB18663/74A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BP PLC
Original Assignee
BP PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BP PLC filed Critical BP PLC
Priority to GB18663/74A priority Critical patent/GB1499985A/en
Priority to DE19752517546 priority patent/DE2517546A1/en
Priority to US05/571,696 priority patent/US4007380A/en
Priority to NL7505035A priority patent/NL7505035A/en
Priority to FR7513201A priority patent/FR2269138A1/fr
Priority to NO751514A priority patent/NO146927C/en
Priority to JP50051991A priority patent/JPS6029962B2/en
Publication of GB1499985A publication Critical patent/GB1499985A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D3/00—Control of position or direction
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D3/00—Control of position or direction
    • G05D3/12—Control of position or direction using feedback
    • G05D3/14—Control of position or direction using feedback using an analogue comparing device

Abstract

1499985 Oil well choke control BRITISH PETROLEUM CO Ltd 8 April 1975 [29 April 1974] 18663/74 Heading G3N An oil well choke (i.e. for restricting oil or gas flow in an oil well flow line) is retroactively electrically controlled. The choke has two discs each formed with two circular diametrically opposed apertures, one disc being relatively rotated with respect to the other to restrict the flow. The control system produces a first electric signal indicating required choke position and a second electric signal indicating actual choke position using amplifiers A1-A4 connected to differential amplifiers A5-A7. A positive voltage output from amplifier A5 actuates trigger circuit VT1, VT2 to cause transistor VT3 to conduct and energize relay RLA. This primes a solenoid actuation circuit in one direction for the choke. A negative voltage output from amplifier A7 actuates trigger circuit VT8, VT9 to cause transistor VT10 to conduct and energize relay RLB. This primes a solenoid actuation circuit in the other direction for the choke. A positive or negative voltage output from amplifier A6 switches off transistor VT4 or VT5 and de-energizes normally energized relay RLB which primes the solenoid actuation circuit for both directions. The circuit can be actuated remotely by a telemetry system for offshore wells and, if faults arise, the choke can be locked in position and an alarm lamp lit. A calibration unit Fig. 2 (not shown) is also described.
GB18663/74A 1974-04-29 1974-04-29 Control of chokes Expired GB1499985A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB18663/74A GB1499985A (en) 1974-04-29 1974-04-29 Control of chokes
DE19752517546 DE2517546A1 (en) 1974-04-29 1975-04-21 AIR FLAP CONTROL
US05/571,696 US4007380A (en) 1974-04-29 1975-04-25 Control of chokes
NL7505035A NL7505035A (en) 1974-04-29 1975-04-28 CONTROL OF OIL SOURCES VALVES.
FR7513201A FR2269138A1 (en) 1974-04-29 1975-04-28
NO751514A NO146927C (en) 1974-04-29 1975-04-28 DEVICE FOR CONTROL OF VALVE VALVE.
JP50051991A JPS6029962B2 (en) 1974-04-29 1975-04-28 Choke valve control device for oil wells

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB18663/74A GB1499985A (en) 1974-04-29 1974-04-29 Control of chokes

Publications (1)

Publication Number Publication Date
GB1499985A true GB1499985A (en) 1978-02-01

Family

ID=10116320

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18663/74A Expired GB1499985A (en) 1974-04-29 1974-04-29 Control of chokes

Country Status (7)

Country Link
US (1) US4007380A (en)
JP (1) JPS6029962B2 (en)
DE (1) DE2517546A1 (en)
FR (1) FR2269138A1 (en)
GB (1) GB1499985A (en)
NL (1) NL7505035A (en)
NO (1) NO146927C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2131201A (en) * 1982-11-17 1984-06-13 Limitorque Ltd Circuit for controlling switching of an electrical supply to an electric motor
GB2222702A (en) * 1988-07-25 1990-03-14 Nissan Motor Wheel slip suppressive throttle control

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2817297A1 (en) * 1978-04-20 1979-10-31 Rockwell Golde Gmbh ARRANGEMENT FOR GENERATING POSITIONING MOVEMENTS ON VEHICLE VENTILATION DEVICES
EP0072650A3 (en) * 1981-08-07 1985-05-08 The Commonwealth Of Australia Component state monitoring
US4482847A (en) * 1983-02-25 1984-11-13 Johnson Service Company Electrically-controlled rotary actuator
US4848473A (en) * 1987-12-21 1989-07-18 Chevron Research Company Subsea well choke system
JP2515874B2 (en) * 1989-02-28 1996-07-10 リンナイ株式会社 Combustion device
CN111765286A (en) * 2020-06-04 2020-10-13 嘉里粮油(防城港)有限公司 System and method for preventing oil filling room pipeline from being mistakenly opened

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1182786A (en) * 1966-11-18 1970-03-04 Ici Ltd Control or Alarm Method and Apparatus.
US3821726A (en) * 1972-05-08 1974-06-28 Santa Fe Int Corp Blow out sensor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2131201A (en) * 1982-11-17 1984-06-13 Limitorque Ltd Circuit for controlling switching of an electrical supply to an electric motor
GB2222702A (en) * 1988-07-25 1990-03-14 Nissan Motor Wheel slip suppressive throttle control
US5157956A (en) * 1988-07-25 1992-10-27 Nissan Motor Company, Limited Method of calibrating a throttle angle sensor
GB2222702B (en) * 1988-07-25 1993-03-10 Nissan Motor Wheel slippage suppresive throttle control system for automotive internal combustion engine

Also Published As

Publication number Publication date
DE2517546A1 (en) 1975-11-06
NL7505035A (en) 1975-10-31
JPS6029962B2 (en) 1985-07-13
US4007380A (en) 1977-02-08
JPS50160690A (en) 1975-12-26
NO146927B (en) 1982-09-20
NO751514L (en) 1975-10-30
NO146927C (en) 1982-12-29
FR2269138A1 (en) 1975-11-21

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930408